Posts by andreas

Accessing the HF2 using Visual Basic .NET

on 01.01.2014 at 12:00 by andreas on Blog of Andreas Senn
This article briefly describes, how to access an HF2LI or HF2IS using Visual Basic .NET (VBA.NET, VB.NET). Foreword Please consider that VB is not a supported programming language and it does not appear in the official list. A software update […]

HF2PLL for KPFM Applications

on 14.04.2013 at 13:17 by andreas on Blog of Andreas Senn
Kelvin Probe Force Microscopy (KPFM) is a scanning technique that allows the detection of a electrostatic potential distribution of a surface. The HF2PLL supports several variants of KPFM, some of them are mentioned in this post. Amplitude modulated KPFM (AM-KPFM) […]

Setting up a Digitally Tunable Resonator using the HF2LI

on 07.12.2012 at 16:32 by andreas on Blog of Andreas Senn
This article describes how to simulate a band pass filter or resonator using the HF2LI lock-in amplifier. The digitally tunable parameters make it very versatile and e.g. allow to use it for benchmarking a phase locked loop. Hardware Requirements To […]

Q-Control Example VI Tutorial

on 04.12.2012 at 19:45 by andreas on Blog of Andreas Senn
Using a Zurich Instruments lock-in amplifier, you are enabled to measure the quality factor of an arbitrary resonator – typically a resonant beam used in non-contact atomic force microscopy (NC-AFM) applications. This can be useful e.g. to increase phase sensitivity […]

Using TipProtect to extend AFM tip life expectancy

on 03.12.2012 at 14:51 by andreas on Blog of Andreas Senn
Using a Zurich Instruments Lock-In amplifier, you are enabled to perform a multitude of AFM measurement modes. Particularly interesting is NC-AFM operation which makes use of the built-in PLL capability. Earlier, a user could easily crash his tip into a […]

Manually Starting a ziServer

on 03.12.2012 at 13:23 by andreas on Blog of Andreas Senn
If you read this article, you’ve probably been asked by Zurich Instruments’ customer support to manually start a ziServer for testing purposes. Your input is highly appreciated and will help to improve our product. To circumvent confusion, please provide the […]

Calculating Filter Settling Times

on 30.08.2012 at 16:25 by andreas on Blog of Andreas Senn
Please use this calculator to get an idea of the time the demodulator filter needs to settle in order to achieve a specified accuracy given the filter order and time constant

Using the HF2LI as a 4-Channel Lock-in Amplifier

on 16.08.2012 at 16:21 by andreas on Blog of Andreas Senn
Block diagram of the HF2LI set up as a 4-channel lock-in amplifier
This article is intended for users who are already familiar with the 2-channel 50 MHz HF2LI Lock-in Amplifier and want to extend it to four independent lock-in channels for measurements at frequencies up to 100 kHz. Please note that the […]

Connecting the Nanosurf Manual Controller to a Zurich Instruments HF2LI or HF2PLL

on 02.04.2012 at 09:39 by andreas on Blog of Andreas Senn
In March 2011, Nanosurf and Zurich Instruments announced a cooperation to establish the HF2PLL as official upgrade path for Nanosurf’s EasyPLL. This post shows how to connect Nanosurf’s Manual Controller to the Zurich Instruments HF2PLL. The Manual Controller combined with […]